Home / 31,855.90-47,789.60-13,125.70

Finding the Fourth Proportional to 31,855.90, 47,789.60 and 13,125.70

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Solution

The fourth proportional to 31,855.90, 47,789.60 and 13,125.70 is: 19,690.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,855.90 : 47,789.60 = 13,125.70 : x
  2. Step 2: Convert to fraction form
    31,855.90/47,789.60 = 13,125.70/x
  3. Step 3: Cross multiply
    31,855.90x = 47,789.60 × 13,125.70
  4. Step 4: Simplify right side
    31,855.90x = 627,271,952.72
  5. Step 5: Solve for x
    x = 627,271,952.72/31,855.90
  6. Step 6: Final answer
    x = 19,690.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.